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From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org, linux-trace-devel@vger.kernel.org
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>,
	Ingo Molnar <mingo@kernel.org>, Jiri Olsa <jolsa@redhat.com>,
	Namhyung Kim <namhyung@kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	"Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com>
Subject: [PATCH 08/23 v3] tools lib traceevent: Add plugin for tlb_flush
Date: Tue, 21 Jul 2020 21:16:36 -0400
Message-ID: <20200722011753.546498613@goodmis.org> (raw)
In-Reply-To: <20200722011628.925541477@goodmis.org>

From: "Steven Rostedt (Red Hat)" <rostedt@goodmis.org>

The tlb_flush tracepoints uses enums that are not yet known by
the traceevent library. Add a plugin to handle that.

Link: http://lore.kernel.org/linux-trace-devel/20200625100516.365338-9-tz.stoyanov@gmail.com

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
[ Ported from trace-cmd.git ]
Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
 tools/lib/traceevent/plugins/Build        |  1 +
 tools/lib/traceevent/plugins/Makefile     |  1 +
 tools/lib/traceevent/plugins/plugin_tlb.c | 81 +++++++++++++++++++++++
 3 files changed, 83 insertions(+)
 create mode 100644 tools/lib/traceevent/plugins/plugin_tlb.c

diff --git a/tools/lib/traceevent/plugins/Build b/tools/lib/traceevent/plugins/Build
index 210d26910613..b866f231a536 100644
--- a/tools/lib/traceevent/plugins/Build
+++ b/tools/lib/traceevent/plugins/Build
@@ -8,3 +8,4 @@ plugin_function-y     += plugin_function.o
 plugin_xen-y          += plugin_xen.o
 plugin_scsi-y         += plugin_scsi.o
 plugin_cfg80211-y     += plugin_cfg80211.o
+plugin_tlb-y          += plugin_tlb.o
\ No newline at end of file
diff --git a/tools/lib/traceevent/plugins/Makefile b/tools/lib/traceevent/plugins/Makefile
index 349bb81482ab..8e72707e8630 100644
--- a/tools/lib/traceevent/plugins/Makefile
+++ b/tools/lib/traceevent/plugins/Makefile
@@ -137,6 +137,7 @@ PLUGINS += plugin_function.so
 PLUGINS += plugin_xen.so
 PLUGINS += plugin_scsi.so
 PLUGINS += plugin_cfg80211.so
+PLUGINS += plugin_tlb.so
 
 PLUGINS    := $(addprefix $(OUTPUT),$(PLUGINS))
 PLUGINS_IN := $(PLUGINS:.so=-in.o)
diff --git a/tools/lib/traceevent/plugins/plugin_tlb.c b/tools/lib/traceevent/plugins/plugin_tlb.c
new file mode 100644
index 000000000000..1adade776306
--- /dev/null
+++ b/tools/lib/traceevent/plugins/plugin_tlb.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2015 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License (not later!)
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not,  see <http://www.gnu.org/licenses>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "event-parse.h"
+
+enum tlb_flush_reason {
+	TLB_FLUSH_ON_TASK_SWITCH,
+	TLB_REMOTE_SHOOTDOWN,
+	TLB_LOCAL_SHOOTDOWN,
+	TLB_LOCAL_MM_SHOOTDOWN,
+	NR_TLB_FLUSH_REASONS,
+};
+
+static int tlb_flush_handler(struct trace_seq *s, struct tep_record *record,
+			     struct tep_event *event, void *context)
+{
+	unsigned long long val;
+
+	trace_seq_printf(s, "pages=");
+
+	tep_print_num_field(s, "%ld", event, "pages", record, 1);
+
+	if (tep_get_field_val(s, event, "reason", record, &val, 1) < 0)
+		return -1;
+
+	trace_seq_puts(s, " reason=");
+
+	switch (val) {
+	case TLB_FLUSH_ON_TASK_SWITCH:
+		trace_seq_puts(s, "flush on task switch");
+		break;
+	case TLB_REMOTE_SHOOTDOWN:
+		trace_seq_puts(s, "remote shootdown");
+		break;
+	case TLB_LOCAL_SHOOTDOWN:
+		trace_seq_puts(s, "local shootdown");
+		break;
+	case TLB_LOCAL_MM_SHOOTDOWN:
+		trace_seq_puts(s, "local mm shootdown");
+		break;
+	}
+
+	trace_seq_printf(s, " (%lld)", val);
+
+	return 0;
+}
+
+int TEP_PLUGIN_LOADER(struct tep_handle *tep)
+{
+	tep_register_event_handler(tep, -1, "tlb", "tlb_flush",
+				   tlb_flush_handler, NULL);
+
+	return 0;
+}
+
+void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
+{
+	tep_unregister_event_handler(tep, -1,
+				     "tlb", "tlb_flush",
+				     tlb_flush_handler, NULL);
+}
-- 
2.26.2



  parent reply index

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-22  1:16 [PATCH 00/23 v3] tools lib traceevent: Synchronizing trace-cmd with tools Steven Rostedt
2020-07-22  1:16 ` [PATCH 01/23 v3] tools lib traceevent: Add API to read time information from kbuffer Steven Rostedt
2020-07-22  1:16 ` [PATCH 02/23 v3] tools lib traceevent: Add proper KBUFFER_TYPE_TIME_STAMP handling Steven Rostedt
2020-07-22  1:16 ` [PATCH 03/23 v3] tools lib traceevent: Add tep_load_plugins_hook() API Steven Rostedt
2020-07-22  1:16 ` [PATCH 04/23 v3] tools lib traceevent: Add interface for options to plugins Steven Rostedt
2020-07-22  1:16 ` [PATCH 05/23 v3] tools lib traceevent: Introduced new traceevent API, for adding new plugins directories Steven Rostedt
2020-07-22  1:16 ` [PATCH 06/23 v3] tools lib traceevent: Add support for more printk format specifiers Steven Rostedt
2020-07-22  1:16 ` [PATCH 07/23 v3] tools lib traceevent: Optimize pretty_print() function Steven Rostedt
2020-07-22  1:16 ` Steven Rostedt [this message]
2020-07-22  1:16 ` [PATCH 09/23 v3] tools lib traceevent: Add more SVM exit reasons Steven Rostedt
2020-07-22  1:16 ` [PATCH 10/23 v3] tools lib traceevent: Add offset option for function plugin Steven Rostedt
2020-07-22  1:16 ` [PATCH 11/23 v3] tools lib traceevent: Add plugin for decoding syscalls/sys_enter_futex Steven Rostedt
2020-07-22  1:16 ` [PATCH 12/23 v3] tools lib traceevent: Move kernel_stack event handler to "function" plugin Steven Rostedt
2020-07-22  1:16 ` [PATCH 13/23 v3] tools lib traceevent: Add builtin handler for trace_marker_raw Steven Rostedt
2020-07-22  1:16 ` [PATCH 14/23 v3] tools lib traceevent: Change to SPDX License format Steven Rostedt
2020-07-22  1:16 ` [PATCH 15/23 v3] tools lib traceevent: Fix reporting of unknown SVM exit reasons Steven Rostedt
2020-07-22  1:16 ` [PATCH 16/23 v3] tools lib traceevent: Document tep_load_plugins_hook() Steven Rostedt
2020-07-22  1:16 ` [PATCH 17/23 v3] tools lib traceevent: Handle strdup() error in parse_option_name() Steven Rostedt
2020-07-22  1:16 ` [PATCH 18/23 v3] tools lib traceevent: Fix typo in tep_plugin_add_option() description Steven Rostedt
2020-07-22  1:16 ` [PATCH 19/23 v3] tools lib traceevent: Improve error handling of tep_plugin_add_option() API Steven Rostedt
2020-07-22  1:16 ` [PATCH 20/23 v3] tools lib traceevent: Fixed broken indentation in parse_ip4_print_args() Steven Rostedt
2020-07-22  1:16 ` [PATCH 21/23 v3] tools lib traceevent: Fixed type in PRINT_FMT_STING Steven Rostedt
2020-07-22  1:16 ` [PATCH 22/23 v3] tools lib traceevent: Fixed description of tep_add_plugin_path() API Steven Rostedt
2020-07-22  1:16 ` [PATCH 23/23 v3] tools lib traceevent: Handle possible strdup() error in " Steven Rostedt

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